Nice perception.

good teaching, could you do some operation with a custom function on a single panda series, say comparing every value with each other for example if your take a column from ohlcv data of any stock, daily low values, range of 20 days, find the trend in the column of values, like uptrend or downtrend using price action method. it is a challenging task

series size is mutable not immutable

how datatype value as 64 for int

detaframe tutorial

Great video! Take a look at my Pandas tutorial if you want.